Pickup device for piles



Nov. 18, 1941. \G. A. MQCAMMON 2,262,810

PICKUP DEVICE FOR PILES Filed Aug. 31, 1939 MW. 777 Ca/mmm INVENTOR.

WWW

ATTORNEY. 7

Patented Nov. 18, 1941 PICKUP DEVICE FOR PILES George A. McCammon, LaSalina, Venezuela, as-

signor to Standard Oil Development Company, a corporation of DelawareApplication August 31, 1939, Serial No. 292,806

2 Claims.

The present invention is directed to a pickup device for piles,particularly concrete piles.

The principal object of the present invention is the provision of adevice which can be attached to a lifting cable so as to make possiblethe picking up of concrete piles and the disengagement of the liftincable from the pile after the pile is set in place.

Further objects and advantages of the present invention will appear fromthe accompanying drawing in which- Figure 1 is a side elevation of alifting device of the present invention in engagement with a pile; and

Figure 2 is a cross section of Figure 1 along the line AA.

Referring to the drawing in detail, numeral 1 designates a concrete pileprovided with a transverse bore 2 lined with a pipe 3. This pipe is setin place when the pile is cast and is provided particularly for the useof the pickup device of the present invention.

The pickup device of the present invention comprises a roller 4 adaptedto slide through pipe 3 having at each end a section 5 of reduceddiameter followed by a flange 6. At one of its ends a rope I is anchoredin place so that the roller can be recovered after the pile is in placeand the pickup device has been disengaged therefrom.

To cooperate with the roller 5 a pair of fiat bars 8 is provided, eachof which has at one end an eye 9 adapted to receive a lifting cable H]which may be a length of cable formed in a loop the ends of which arefastened together by a clamp II and to which is attached the main lengthof cable l2, or which may be two separate lengths of cable attached tothe main cable with a Y-connection. The other end of each bar has abroadened section [3 in which is a slot having a lower end l4 of a widthslightly greater than the outside diameter of the reduced section 5 ofroller 4, and an upper end l5 of a width greater than the outsidediameter of the flange B on roller 4. The outer face of the lower end ofeach bar is provided with a raised section l6 of a thickness such as tofill the space between the flange 6 and the body of roller 4. The upperedge of this thickened section is rounded as shown at I! so as tofacilitate the entry of this thickened section into the spacedesignated. On its inner face, at a point beginning intermediate theends of the enlarged portion l5 of the slot, each bar is provided with araised surface I8 the ends of which are also rounded as shown. Thepurpose of this thickened section is to assist in the disengagement ofthe bars 8 from the roller 4 when by manipulation of the lifting linethe bars 8 are caused to slide down relative to roller .4.

In use, the bars are attached to the roller as shown, and the pilelifted and set in place. Then the lifting cable is suddenly slackened,thereby causing the bars to slide over the reduced section of roller 4.When this happens, the wide portion l5 of the slot is thrust over theflange 6 and the bars are disengaged from the roller which may beseparately recovered as already-indicated.

It will be understood that the present invention may be modified invarious ways without departing from its scope which is defined in theappended claims, which are intended to be drawn as broadly as the priorart permits.

What is claimed is:

1. A lifting device for a pile or beam comprising a rod member adaptedto pass through the pile and protrude beyond the sides thereof andhaving a section of reduced diameter on each of its protruding ends incombination with a pair of arms adapted to be carried by a liftingcable, each of said arms being provided with a longitudinal slot havingat its lower end a section of narrow width corresponding to the diameterof the reduced section of said rod and at its upper end a section ofgreater width than the diameter of the ends of said rods and with araised portion arranged to be in contact with said pile adjacent theupper end of said slot.

2. A lifting device for a pile or beam comprising a rod member adaptedto pass through the pile and protruding beyond the sides thereof, havinga groove on each of its protruding ends in combination with a pair ofarms, each of said arms having one end provided with a first opening atits other end provided with a longitudinal slot having at its lower enda section of narrow width corresponding to the diameter of the groovedsections of said rod and at its upper end a section of greaterwidth thanthe diameter of the end of said rod, a raised portion on one side ofeach of said arms adjacent the upper ends of said slots, said pair ofarms having a cable passed through said first openings and formed into aloop for suspending said arms.

GEORGE A. McCAMMON.

